Add test-run-all and test-emulate-all make targets
Add test-run-all and test-emulate-all make targets

- test-run-all target runs the following tests in spike;
  test-run-rv64 test-run-rvc64 test-run-rv32 test-run-rvc32
- test-emulate-all target runs the follow tests in riscv-meta emulator
  test-emulate-rv64 test-emulate-rvc64 test-emulate-rv32 test-emulate-rvc32

rv8-io/rv8,rv8-io/rv8,rv8-io/rv8